A masked robber who allegedly threated a NSW service station worker while armed with a knife and gun remains on the run, as police issue a fresh plea for information.

NSW Police on Monday shared CCTV images of the masked assailant, who allegedly demanded money and cigarettes before running off from the service station on Withers St, West Wallsend near Newcastle about 11.20pm on May 15.

Similar to a character from the hit Spanish crime drama Money Heist, the man is seen wearing a plastic Salvador Dali mask as he allegedly approached the counter armed with a gun and knife and threatened the employee.

Police say he then ran from the store before the 27-year-old worker, who escaped injury, called police.

Months later, Lake Macquarie Police continue to appeal for information.

The man is described as being about 170cm tall, of medium to large build and wearing a black Tommy Hilfiger hooded jumper, black tracksuit pants, black shoes and blue medical gloves.

Detective Chief Inspector Scott Parker said the incident was brazen and posed a significant danger to the worker and the wider community.

“While it’s fortunate no one was physically injured, the trauma inflicted on victims in incidents like this, especially when firearms are involved, can cause long-term damage,” Parker said.

“There are people in the community who would know who this man is; whether you are a friend or family member, we urge you to do the right thing and contact police.”

Anyone with information is asked to contact Crime Stoppers on 1800 333 000 or report online via nsw.crimestoppers.com.au.

Extracted in full from: Masked man targets service station armed with gun, knife in ‘brazen’ robbery | 7NEWS